Tire-valve.



M. C. SCHWEINERT & H. P. KRAFT.y

TIRE VALVE.

APPLICATION mes MAR.14,1910.

Patented Jan. 9, 1917.

INVENTORS:

WUNESSES:

' CHARLES SCHWEINERT,

UNITED sTATEs PATENT oEEioE.

MAXIMILIAN CHARLES SCHWEINERT, OF'W'EST HOBOKEN, NEW JERSEY, .AND HENRYP. KRAFT, 0F BROOKLYN, NEW YORK.

TIRE-VALVE.

Specification of Letters Patent.

Patented Jan. 9, 1917.

Application filed March 14, 1910.- Serial No. 549,242.

To all whom t may concern: I

Be itknown that we, MpxiMILIAN residing in- West Hoboken, in the countyof Hudson and State of New Jersey, and HENRY P. KRAFT, residing in theboroughof Brooklyn, vcounty of Kings, cityland State of New York, bothcitizens of the United States, have invented certain new and usefulImprovements yin Tire-Valves, of which the following is a specification@The inventionl relates to tire valves and aims to provide certainunprovements therein.

The present invention in its preferred form is especially adapted foruse in connection with so-called demountable rims, that is to say, rimswhichA are detachably connected to the wheel and which are designed tocarry the fully inflated tire, the rim and tire being held in reserve,and substituted in case of accident for a similar tire and rim upon thewheel. In this type of rim and tire it is' desirable that the valveshall extend materially inward from the inner -face of the rim, so thatit may be easily applied to the wheel lrim without weakening the latter.

The invention in its preferred form provides a valve shell in two parts,the first of which is provided with the valve proper or check, and thesecond of which is designed to be detachably connected to the first, andto extend inwardly through the wheel rim so that thetire may be iniatedor deflated .without removing the demountable rim from the wheel.Preferably also the part carrying the valve proper is'provided with apump connection by which the tire may be deflated when demounted withoutthe necessity of coupling the second part to the first. The inventionincludes 'other improvements which willbe hereinafter more fullylpointed out.

In. the drawings which illustrate several forms of the invention, Figure1 is an elevationpf one form. Fig. 2 is an enlarged `longitudinalsection-bof Figpl. Fig. v3 is a.

Fig. 6 is a section similar to Fig. 5 showing another such embodiment.

Referring to the drawings, let A indicate the valve as a whole which isshown as comprising two parts, B and C. The lower part B is adapted tobe screwed to or otherwise engaged with the inner tube of the tire, forthis purpose being provided with Va suitable exterior screw a adapted toreceive the usual clamping nuts as shown. Within the part B is located avalve proper D which may be of any suitable construction, thatillustrated being of the wellknown Schrader type. no detaileddescription further than to say that it comprises a valve seat b, avalve member c engaging the lower face thereof, and the valve memberbeing normally pressed upwardly by a spring d. The valve seat is held inposition by a screw-threadedl plug e which presses the seat down- Thisvalve requires wardly against an inclined shoulder in the shell so thatits packing f makes 'a tight joint between the seatl and the shoulder. The parts are held together by a delating pin g. v

The shell B is provided at its upper end with an enlarged socket orrecess adapted to receive the lower end of the member C in a manner tobe described, and into such recess there extends upwardly a nipple Lwhich is preferably formed integrally with the body of the member B andwhich is shown as internally screw-threaded' to engage the plug e. .Theupper end of the shell B is also screw-threaded.

The member C is shown as comprising a part E, the outer end of which isscrewthreaded externally to receivethe usual cap F and internally toreceive the ordinary pump connection. It is important that an air-tightjoint be provided between the lower end of the part E and the member Bso that during the Vact of inflation through the member E there will beno leakage of air around the joint Ivand also `for the purpose ofutilizing the cap F to prevent escape of air from the tire in case thereis a leakage through the valve proper.

The preferred construction is illustrated iny the upper recess in theshell B and is provided with a flange j seating against a shoulder Z atthe bottom of said recess. Above the flange j is located a packing ringand above this packing ring is preferably located a metal washer m whichis designedto be pressed downwardly to expand the packing against thewalls of the shell B. The invention provides a means for expanding thispacking which mayl be operated from a point near the upper end of thepart E, which means is shown as comprising an elongated sleeve Gencircling the body of the part E and being adapted to slide thereon.The sleeve G is formed at its lower end with a screw-threaded portion ndesigned to engage the interior thread 0 formed on the interior of thepart B. When the threads are engaged and the sleeve G isscrewedfdownwardly, it presses upon the washer m, which in 4turncompresses the packing lc and forces it out'- wardly into engagementwith the wall of the part B. In order to prevent the removal of thesleeve G, a flange p is preferably formed upon the upper part of themember E as shown.

As thus far described the invention is of practical utility especiallyfor use in connection with demountable tires. In practice the lower partB is connected to the inner tube of the tire and projects slightlythrough the usual valve hole in the demountable rim. In use the fullyinflated tire is carried upon the rim until it is desired to replace oneof the tires of the vehicle. The used tire and rim having first beenremoved from the wheel, the reserve tire and rim are slipped over thewheel rim and fastened by any one of the usual methods. The part C isthen inserted through the valve hole in thewooden rim and screwed intoplace in the member B. This may be done easily from the inner side ofthe Wooden rim because of the provision of theelongated sleeve G. If thepart E were to be directly screwed to the part B, there would beconsiderable danger of distorting the packing which is relied upon tomake a tight joint between the parts. By `the present construction notonly is the packing expanded without any torsional effeet, but the partE by means of its flange 7' is seated firmly and securely at the bottomof the recess of the` part B, and a strong mechanical u-nion is providedso that the ordinary shocks or jars to which the valve is subjected willnot disturb the joint. If

the-air pressure within the tire should decrease while the tire is inuse, the valve cap F may be removed -and the tire inflated withoutremoving the rim from the wheel.

In inilating the tire when the latter is not mounted upon the wheel,'thepartC may be screwed into place and the tire inflated in the usual way,whereupon the part C may be removed if desired, or it may be retained inplace until it is desired to use the tire. It will then be removed untilthe rim and tire are placed upon the wheel and aterward restored to itsposition. It is preferred, however, to utilize a further feature of theinvention which consists in providing the member B with a pump.connection so that the tire may be inflated when dismount ed withoutthe necessity of utilizing the part C. In Figs. 2 and 5 the part B isprovided with internal screw threads adapted to receive such a pumpconnection. Itis very desirable to have the same sized connection bothfor the part B and the part E.l In Fig. 5 the part E is shown with anenlarged upper end r provided with an internal screw thread s designedto receive the pump connection and an external thread t designed toreceive 'the cap, which latter in this case will be correspondinglyproportioned. The internal diameter and thread of the enlarged portion rcorresponds to the iiernal diameter and thread of the recess of' thepart B so that the same pump connection can be used in both places. Itis preferred, however, to utilize a pump connection of the usual size,and in Fig. 6 a construction is shown by which this result is secured.In this construction the nipple la. is continued upwardly beyond thepoint shown in Fig. 2, and its exterior is screw-threaded at u. to`receive the same size pump connection as fits the upper end of the partE. With this construction the part C need not be applied to the part Bexcept when the tire is actually in place upon the wheel. The inventionincludes the provision of such a cap which in its preferred form isillustrated in Figs. 3 and 4. As shown in these figures the cap consistsof a body v having a flange j at its lower end and a packing 1immediately above said flange. Above the packing is located a metal ringm which is designed to be pressed down by a screwthreaded sleeve memberG to expand the packing lc into contact'with the wall of the shell B.The sleeve member G is `swiveled to the body v a's shown by means cfacentral `projection lw formed on the body o 'which extends through ahole a? in the sleeve member G. The hole is formed. with an enlargedupper end and theprojection w is upset thereintohold the parts together.A screw. driver slot y is preferably provided in the sleeve member G sothat it may be tightened in place. The cap is screwed down in the upperrecess of the member B, the screw-threaded sleeve member G engaging thescrew threads of the recess.

It will be 4understood that while several formsof the device have beenyshown and described, the inventionis not limited to the particularembodiments set forth, as various changesmay be, made therein withoutdeparting from the invention. It will also be understood that while theinvention has been described in its complete form, the several featuresthereof may be independentlyf uti-l lized if desired.

What I claim is:

l. In a tire valve, a valve shell formed in two parts, the lower partbeing provided with a socket at its top, and the upper part beingadapted to fit in said socket, said lower part being formed with athreaded portion, and a sleeve encircling the upper partand having athreaded portion adapted to engage the threads of said lower part.

2. In a tire valve, a valve shell formed in two parts, the lower partbeing provided with a socket at its top, andthe upper part being adaptedto lit in said socket, a packing ring surrounding said upper" partwithin said socket, an anti-friction ring above and in contact with saidpacking ring, and a screw-threaded sleeve adapted to engage screwthreads on said lower part and to press said anti-friction ring inwardlywhereby to expand said packing against the wall of said lower part. A

3. In a tire valve, a valve shell formed in two parts, the lower of saidparts having a valve proper therein, and the upper of said parts beingadaptedto fit into said lower part, and both of said parts havingprovisions of the same size for engaging a pump connection.

4. `In a tire valve, a valve shell formed in two parts, -the lower ofsaid parts having a valve proper therein, and the upper of said partsbeing adapted to fit into said lower part, and both of said parts havingscrew-threaded portions adapted to t a single pump connection.

5 In a tire valve or the like, the combination of a lower member adaptedto be attached to a tire and having a valve proper therein, and a secondmember adapted to be connected to said first 4 member, said secondmember having a lower flange, a packing ring surrounding said memberabove said flange, an anti-friction ring above said packing, and a.screw-threaded part adapted to engage screw threads on said lower memberto force said packing against the Wall of said lower'member.

6. In a tire valve, a valve shell formed in two parts, tlelower of saidparts having a valve proper therein, and the upper 'of said parts beingadapted to fit into said lower part, said lower part having an annularscrew-threaded channel on its upper end between the inner and outerwalls thereof'adapted to receive said upper part.

7. In a tire valve, a valve shell formed in two parts, the lower ofsaidparts having a valve proper therein, and the upper of said parts beingadapted to iit into said lower part, said lower part having an annularchannel on its upper end between the inner and outer walls thereofadapted to receive said upper part.-

8. In a tire valve, a valve shell 'formed in two parts, the lower ofsaid parts having a valve proper therein,'and the upper of said partsbeing adapted to fit into said lower part, said lower part having anannular screw-threaded channel on its upper end between the inner andouter walls thereof adapted to receive said upper part and the centralportion of said lower part projecting beyond the outer portion thereon.

9. In a tire valve, avalve shell formed two parts, the lower of saidparts havlng a valve proper therein, and the upper part being adapted tofit into said lower part, said lower part having an annularscrew-threaded channel on its upper end adapted to receive said upperpart and the central portion of said lower part and being provided withexternal` and internal screw-threads projectingbeyond the outer portionthereof.

10. In a tire valve, a valve shell formed in two parts, the lower ofsaid parts having a valve proper therein, and the upper parts beingadapted to fit into said lower part, said lower part having an annularscrewthreaded channel on its upper end adapted to receive said upperpart and the central portion of said lower part projecting beyond theouter portion thereof and being provided with external and internalscrewthreads. v

11. In a tire valve or the like, the combination of a lower member,adapted to be attached to a tire, having a valve 'pro er V and a sockettherein, and a second mem r adapted to be connected to said firstmember,

said second member having a lower flange aga-inst the wall of the socketin said lower Y member.

In wltness whereof we have hereunto vsigned our names' in the presenceof two subscribing witnesses.

MAXIMILIAN CHARLES seHwEIN-ERT. HENRI r. KRAFT.

Witnesses:

EUGENE V. MYERS, yIl RED WHITE.

